java.nio.files.StandardWatchEventKinds.ENTRY_MODIFY problem

import java.io.Writer;
import java.nio.charset.Charset;
import java.nio.file.ClosedWatchServiceException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardWatchEventKinds;
import java.nio.file.WatchEvent;
import java.nio.file.WatchKey;
import java.nio.file.WatchService;
import java.nio.file.attribute.FileAttribute;

class NioModifiedProblem {
    public static void println(String str) {
        System.out.println(str);
    }
    public static void printFileInfo(Path path) {
        try {
            println(String.format("File %s, size %d, modified %s", path, Files.size(path), Files.getLastModifiedTime(path)));
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        String data = "Some not too long string goes here. Goes. Goes.";
        try {
            final Path path = Files.createTempFile("nioProblem", ".tmp", new FileAttribute[0]);
            path.toFile().deleteOnExit();
            println("Created");
            printFileInfo(path);

            Thread thread = new Thread() {
                public void run() {
                    try {
                        final Path parent = path.getParent();
                        final WatchService service = parent.getFileSystem().newWatchService();
                        WatchKey key = parent.register(service, StandardWatchEventKinds.ENTRY_MODIFY);
                        try {
                            while (true) {
                                for (WatchEvent<?> event : service.take().pollEvents()){
                                    Path modifiedPath = parent.resolve((Path)event.context());
                                    println("Path "+modifiedPath+" modified EVENT."); // This is printed only once, on file opening.
                                    printFileInfo(modifiedPath);
                                }
                            }
                        } catch (ClosedWatchServiceException e) {
                            println("Service closed");
                        }
                    } catch (Throwable e) {
                        e.printStackTrace();
                    } finally {
                        println("Watcher thread exiting");
                    }
                }
            };
            thread.setDaemon(true);
            thread.start();

            Thread.sleep(1000);
            Writer fw = Files.newBufferedWriter(path, Charset.forName("UTF-8"));
            println("Opened");
            printFileInfo(path);

            Thread.sleep(1000);
            fw.write(data);
            println("Written");
            printFileInfo(path);

            fw.close();
            println("Closed");
            printFileInfo(path);

            Thread.sleep(1000);
            println("Sleeped");
            printFileInfo(path);
            return;
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }
}

// Java(TM) SE Runtime Environment (build 1.7.0-b147)
// Output:
// Created
// File C:\Users\b\AppData\Local\Temp\nioProblem190636654560972941.tmp, size 0, modified 2011-09-14T16:20:06.782Z
// Opened
// Path C:\Users\b\AppData\Local\Temp\nioProblem190636654560972941.tmp modified EVENT.
// File C:\Users\b\AppData\Local\Temp\nioProblem190636654560972941.tmp, size 0, modified 2011-09-14T16:20:07.807Z
// File C:\Users\b\AppData\Local\Temp\nioProblem190636654560972941.tmp, size 0, modified 2011-09-14T16:20:07.807Z
// Written
// File C:\Users\b\AppData\Local\Temp\nioProblem190636654560972941.tmp, size 0, modified 2011-09-14T16:20:07.807Z
// Closed
// File C:\Users\b\AppData\Local\Temp\nioProblem190636654560972941.tmp, size 47, modified 2011-09-14T16:20:08.81Z
// Sleeped
// File C:\Users\b\AppData\Local\Temp\nioProblem190636654560972941.tmp, size 47, modified 2011-09-14T16:20:08.81Z